Some time ago I posted my direct stepper motor driven 3D printed penetration machine on reddit. I took the feedback and open sourced it. This is that result. If this is inappropriate for this sub feel free to delete this post. None of the links are explicitly explicit but I marked this as NSFW for safety.

The project overview and images can be found on github.

https://github.com/drmrs/auto_pen

The build process for the hardware and software is now documented in a clear way. and can be found here:

https://github.com/drmrs/auto_pen/blob/master/hardware/README.md

I include everything you need to print, and buy and have included links to what you need to buy. All in all the cost comes to ~$200 but leaves you with a lot of screws and items that could be used on future projects..

I took some efforts to make sure that people that wanted to build this could. If you want to build this and have questions please don't hesitate to send me a message.

Hope you all enjoy it.